I'm new to reloading. Having a hard time finding primers. I found some CCI no. 41 military primers. My question to the group is do I have to lower the powder charge to allow for the Magnum primers adding any pressure? I'm loading .223 Remington 55 grain bullets, using IMR 4198. I'm targeting around 2900-3000 FPS. My mini 14 really likes PMC ammo, better groups than with faster ammo. They advertise 2900 FPS with fMJ-BT, I'm using these. My recipe calls for 19.3 grains of powder, does that sound safe?